Refrigerating apparatus



Oct. 27, 1936. J. KARMAZIN 2,059,114

I REFRIGERATING APPARATUS Filed May 31, 1955 3o v INVENTOR. JwmKAnMAw/v ATTORNEY.

$5.3 "flaw wz' Patented Oct. 27 1 936 UNITED STATES PATENT OFFICE REFRIGERATING APPARATUS I John, Karmazin, Huntington, Ind., assignor to of Michigan Karmazin Engineering Company, a corporation This invention relates to refrigerating apparatus and'more particularly to a combined condenserand receiver for use in rfri'gerating'apparatus.

It is an object of theinvention to provide a combinedcondenser and receiver which may be economically'constructed and which is arranged toform a compact assembly by which the space required. for the condenser and receiver ordinarily employed may be reduced. It is also an object to provide a combined condenser and receiver wherein a receiver portion is mounted vertically along side the condenser portion and is connected thereto in amanner to store condensed refrigerantto a level above the bottomof the heat exchange portion 'without flooding the heat exchange portion.

It is a further obiectto provide a combined condenser and'receiver from a stack of similarly formed sheet metal plates'each of which is provided with at least one groove, preferably of circular form which when assembled together provide a generally helical condensing conduit and an interior receiver chamber.

Further objects and advantages of the present invention will be apparent from the following description, referencebeing had to the accompanying drawing, wherein a preferred form of the present invention is clearly shown,

In the drawing: t

Fig. 1 is a vertical cross sectionoi a combined condenser and receiver constructed in accordance with the present invention;

Fig. 2 is a vertical cross section of a modified form of a combined condenser and receiver adapted for water cooling and showingdiagrammatically the elements of a complete refrigerating system; and

Fig. 3 is a cross section on line 3-3 of Fig. 2. Referring now to Fig. 2, there is illustrated a refrigerating apparatus comprising a compressor i ii driven by a motori! for delivering compressed refrigerant through a conduit M .to a combined condenser and receiver l6. Refrigerant liquefied in the condenser-receiver i8 is delivered through a conduit l8 to an evaporator 2d. The evaporated refrigerant is withdrawn through a conduitrality of similar sheet metal members or' plates 26, each of which is formed with two oppositely facing circular grooves 28 and 30 respectively. The plates 26 are provided with struck-out lugs 82 in the grooves 28 and similar struck-out lugs 34 in the grooves 30. Preferably, but a single lug 1 5 is struck out from each groove in each plate.

The central portion ofthe two top plates 26 is perforated as at 36 and 3,8 and the side wall of the groove 80 in the second plate from the top is able cooling fluid connections 48 and 5d may be also secured to the assembled plate structure simultaneously with thebonding of the plates. There is thus provided an interior receiver chamber 52 extending from the bottom plate dd upwardly to thethird plate from the top. V

The grooves provide condensing paths through which fluid to be condensed passes from the opening til around to the opposite side oi the, groove 30, thence downwardly through the opening formed by the struck-out lug M to the next lower groove ti] and thence completely around the groove 3% to the next opening formed by the struck-out lug M and so on to the bottom of the structure. The grooves 28 provide similar paths for cooling fluid-from the inlet connection ht upwardly through the device through the outlet connection 48. An outlet fitting M is secured to the bottom plate 46 and provides in addition to an outlet for the liquid refrigerant a passage mi and the perforations 38 and t8 and is forced to pass through the opening due to the fact that the third plate from the top of the structure [L5 is imperforate in its central portion. The gaseous refrigerant then follows the various paths through the condensing conduit formed by thegrooves ht. Cooling fluid is admitted to the cooling fluid coriduit formed by the grooves 28 through the inlet .3 connection 50 and following various paths is brought in direct heat exchange relation with the refrigerant flowing downwardly through the con:- densing conduitso that by the time the refrigerant reaches the lower-most turn of the condens- 5 ing conduit at the connection 5|, it is completely liquefied and any excess liquid refrigerant beyond that which is drawn off to the evaporator is stored in the chamber 52. I

In the form of the invention illustrated in Fig. 1, a condenser-receiver is provided which is adapted for air cooling rather than for liquid cooling and is of a construction somewhat analogous to the condenser-receiver l8. In this form of the invention, there is provided a stack of plates 58 which are provided with a single circular groove 58 which forms a condensing conduit. Upper and lower header plates 60 and 82 respectively are secured to the outer walls ofthe groove 58 formed in the top and bottom plates of the stack. The uppermost plate 56 is imperforate in its central portion, but is provided with an opening 64 in the inside wall of the groove 58. Suitable perforations 86 are provided in the central portion of the remaining plates, except the two bottom-most ones,

while a central perforation 68 is provided also in each of the plates intermediate the top and bottom. The bottom plate is provided with a per- 5K each plate. The liquid refrigerant passes through foration Ill in the inside wall of the groove 58. Each of the plates 56 except the'upper-most one is provided with a single perforation 12 in the horizontal wall of the groove 58 and the plates are so stacked that the perforation 12 of each plate will lie diametrically opposite to the corresponding perforation in the next adjacent plate. An outlet conduit 14 passes through the lower header 62 and through the two lower-most plates to communicate with the receiver chamber I6 formed between the top-most plate and the plate next to the bottom plate. The perforations 88 are occupiedby a length of tubing I6 forming a conduit from the spacebetween the two lowermost plates to the space between the two uppermost plates.

In operation of the device, gaseous refrigerant enters through the inlet conduit 18 in the upper header 60 and passes through the opening 64 toof vaporization of compressed refrigerant is.

transferred to the plates Cl and radiated to the air through the outwardly extending fins 80 of the opening 10 and upwardly through the tube 16' to be stored in the'chamber I6 whence it may be withdrawn through the conduit H. L

While the form of embodiment of the present invention as herein disclosed in Figs. 2 and 3 constitutes a preferred form, it is to be understood that other forms, including that shown in Fig. 1 might be adopted, all coming within the scope of the claims which follow.

What is claimedis as follows:

portion to form a portion of a condensing conduit,

a portion of a'wall of a receiver chamber and a heat radia'tingfin; said members being stacked and bonded together 'to'provide an interior receiver chamber and a condensing'conduit. outwardly of the receiving chamber, means for conducting gaseous refrigerant intothe top of the condensing conduit, means for conducting liquefled refrigerant from the bottom of the condensing conduit to the interior of the receiver chamber above the bottom thereof and means for conducting liquid refrigerant out of the bottom portion of the receiver chamber.

2. A combined condenser and receiver for refrigerating apparatus comprising a plurality of sheet metal members each formed with a circular grooved portion to form a portion of a condensing conduit, a portion of a wall of a cylindrical receiver chamber and a heat radiating fin; said members being stacked and bonded together to provide an interior receiver chamber and a condensing conduit outwardly of the receiving chamber, means for conducting gaseous refrigerant into the top of the condensing conduit, means for conducting liquefied'refrigerant from the bottom of the condensing conduit to the interior of the receiver chamber above the bottom thereof and means for conducting liquid refrigerant out of the bottom'portion of the receiver chamber.

3. A combined condenser and receiver for refrigerating apparatus comprising a plurality of sheet metal members each formed with a circular grooved portion to form a portion of a condensing conduit, a portion of a wall of a cylindrical receiver chamber and a heat radiating fln; said members being stacked and bonded together to provide an interior receiver chamber and a condensing conduit providing a generally helical path outwardly of the receiving chamber, means for conducting gaseous refrigerant into'the top of the condensing conduit, means for conducting liquefied refrigerant from the bottom 'of the condensing conduit to. the interior of the receiver chamber above the bottom thereof and means for conducting liquid refrigerant out of the bottom portion of the receiver chamber.

4. A combined condenser and receiver for refrigerating apparatus comprising a plurality of sheet metal members each formed with two oppositely facing grooved portions to form a portion of a condensing conduit, a portion of a cool-; ing fluid conduit, a portion of a wall of a receiver chamber and a heat radiating fin; said members being stacked and bonded together to provide an .interior receiver chamber and a cooling. fluid conduit and a condensing conduit outwardly of the receiving chamber, means for conducting gaseous refrigerant into the top of the condensing conduit, means for conducting liquefied xefrigerant from the bottom of the condensing conduit to Sthe interior of the receiver chamber,

means for conducting liquid refrigerant out of the bottom portion of the receiver chamber, and means forming inlet and outlet connections for the cooling fluid conduit.

5. A combined condenser and receiver for refrigerating apparatus comprising a plurality of sheet metal members each formed with two oppositelyfacing grooved portions to form a portion of a condensing conduit, 9. portion of 'a cooling fluid conduit, a portion ofa wall of a receiver chamber and a heat radiating fln; said members being stacked and bonded together to provide an interior receiver chamber and a cooling fluid conduit and a condensing conduit outwardly of thereceiving chamber, means for conducting gaseous refrigerant into the top of the condensing conduit, means for conducting liquefled refrigerant from the bottom of the condensing'conduit to the interior of the receiver chamber, means for conducting liquid refrigerant out of the bottom portion of the receiver 2,059,114 chamber, means forming inlet and outlet connections for the cooling fluid conduit, and means providing a generally helical path through said condensing conduit.

6.'A combined condenser and receiver'for refrigerating apparatus comprising a plurality of sheet metal members each formed with two oppositely facing grooved portions to form a portion of a condensing conduit, a portion of a cooling fluid conduit, a portion of a wall of a receiver chamber and a heat radiating fin; said members being stacked and bonded together to provide an interior receiver chamber and a cooling fluid conduit and a condensing conduit outthe cooling-fluid conduit, and means providing a generally helical path through said cooling fluid conduit.

7. A combined condenser and receiver for re-' frigerating apparatus comprising a plurality of sheet metal members each formed with a circular grooved portion to form a portion of a condensing conduit, a portion of a wall of a cylindrical receiver chamber and a heat radiating fin; said members being stacked and bonded together to provide an interior receiver chamber and a condensing conduit outwardly of the receiving chamber, means for conducting gaseous refrigerant into the top'of the condensing conduit, means for conducting liquefied refrigerant from the bottom of the condensing conduit to the interior of thereceiver chamber above the bottom thereof and means for'conducting liquid refrigerant, out ofthe bottom portion of the receiver chamber, said grooved portions being provided with struck-out deflectors for pr'oviding'an opening between the adjacent portions of said condensing conduit and for deflecting refrigerant from one portion to the next portion.

8. A combined condenser and receiver for refrigerating apparatus comprisinga plurality of tion of a condensing conduit, a portion of a cooling fluid conduit, a portion of a wall of a receiver chamber and a heat radiating fin; said membersbeing stacked and bonded together to provide an interibr'receiver chamber and a cooling fluid conduit and a condensing conduit outwardly of the receiving chamber, means for conducting gaseo'us refrigerant into the top of the condensing conduit, means for conducting liquefled refrigerant from the bottom of the condensing conduit to the interior of the receiver chamber, means for conducting liquid refrigerant out of the bottom portion of the receiver chamber,

and means forming inlet and outlet connections for the cooling fluid conduit, said coolingfluid conduit being provided with struck-out deflectors for providing an opening between the adjacent portions of said conduit and for deflecting cooling fluid from one portion to the next portion.

9. A combined condenser and receiver for refrigerating apparatus comprising a plurality of sheet metal members each formed with two op positely facing grooved portions to form a portion of a condensing conduit, a portion of a cooling fluid conduit, a portionof a wall of a re-' sheet metal members each formed with two oppositely facing grooved portions to form' a porceiver chamber and a heat radiating fin; said members being stacked andbonded together to provide an interior receiver chamber and a cooling fluid conduit and a condensing conduit 

